Cube shelf



FIG. 1 is a perspective view of a cube shelf, showing our new design;

FIG. 2 is a side view thereof, the opposite side being a mirror image of the side shown;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a perspective view of an alternative embodiment thereof. 

The ornamental design for a cube shelf, as shown and described. 